反应详情

p-Bromo methoxybenzene (0.96 g, 5.2 mmol) was dissolved in THF (50 mL) and n-butyl lithium (2.08 mL, 2.5M in toluene) was added at -70° C. and stirred at this temperature for 10 minutes when the thienyl ketone (1.0 g 5.2 mmol) (see JACS 74: 1733-36 (1952), JCS 1956, 698-705 and Receuil 68: 24 (1949)) dissolved in THF (5 mL) was added. The temperature was allowed to rise gradually to room temperature over night. The mixture was hydrolysed with water (50 mL). Ether (150 mL) was added and the phases were separated, the aqueous phase was extracted with more ether (100 mL) and the combined organic phase was washed with water (70 mL), dried (MgSO4) and the solvent evaporated leaving a semicrystalline black residue. The black residue was dissolved in hot heptane/EtOAc (3:1) and chromatographed on a column of alumina with heptane:EtOAc 3:1 as eluent. The product was isolated in a yield of 0.72 g (46.0%).

1. additionwas added
2. waitto rise gradually to room temperature over night
3. customthe phases were separated
4. extractionthe aqueous phase was extracted with more ether (100 mL)
5. washthe combined organic phase was washed with water (70 mL)
6. dry with materialdried (MgSO4)
7. customthe solvent evaporated
8. customleaving a semicrystalline black residue
9. customchromatographed on a column of alumina with heptane:EtOAc 3:1 as eluent
10. customThe product was isolated in a yield of 0.72 g (46.0%)